Eppendorf 5804R Refrigerated Centrifuge features a powerful, maintenance-free motor and accommodates a variety of rotors for unparalleled application versatility. Fast Cool function pre-cools chamber in as little as 15 minutes. Temperature range from -9°C to 40°C. Standby refrigeration keeps rotor chamber at set temperature while lid is closed. It is three centrifuges in one: a high capacity general-purpose centrifuge for cell harvesting; a high-speed centrifuge for separating cell lysates; and a micro centrifuge for DNA precipitations. This model spins volumes from 0.2 mL to 100 mL. It will accommodate capacities of up to 16 x 15 mL conical or 30 microcentrifuge tubes per run. Interchangeable swing-bucket and high-speed fixed-angle rotors spin microcentrifuge tubes, popular glass and plastic tubes, microplates, and blood collection tubes. Simple, easy-to-use programming: Time, temperature, speed/g-force, and radius values can be entered quickly; 34 user-defined programs with write protection for quick parameter entry ensures reproducibility; Adjustable-speed Short Spin button; Ten acceleration and braking rates-ideal for protecting sensitive samples. Variable speed, maintenance-free motor spins up to 14,000 rpm, 20,800 x g. Low profile 11-inch access height for easy sample loading. Automatic rotor recognition senses rotor type to set maximum allowable speed-ensures safety.